Activity intensity level determination

Abstract

According to an example aspect of the present invention, there is provided an apparatus comprising memory configured to store a user-specific calibration metric, and at least one processing core, configured to determine an activity type identifier of an activity a user is engaged in, and to determine a user-specific intensity level of the activity, wherein determining the user-specific intensity level is based at least partly on the identifier of the activity type, the user-specific calibration metric and data obtained from a kinematic or speed sensor, and to obtain the user-specific calibration metric by causing the apparatus to participate in a calibration procedure, the calibration procedure including communicating heart rate data of the user with a server.

The invention claimed is: 
     
       1. An apparatus comprising:
 memory configured to store a user-specific calibration metric; and 
 at least one processing core, configured to determine an activity type identifier of an activity a user is engaged in, and to determine a user-specific intensity level of the activity, wherein determining the user-specific intensity level is based at least partly on the identifier of the activity type, the user-specific calibration metric and data obtained from a kinematic or speed sensor, and to obtain the user-specific calibration metric by causing the apparatus to participate in a calibration procedure, the calibration procedure including communicating heart rate data of the user with a server, 
 wherein the user-specific intensity level of the activity is determined while the user is not using a heart rate sensor. 
 
     
     
       2. The apparatus according to  claim 1 , wherein the kinematic sensor comprises at least one of an acceleration sensor and an angular velocity sensor. 
     
     
       3. The apparatus according to  claim 1 , wherein the communication with the server comprises providing to the server at least one of the following: a gender of the user and an age of the user. 
     
     
       4. The apparatus according to  claim 1 , wherein the user-specific calibration metric comprises a mapping from a set of kinematic sensor data characteristics to a set of user-specific intensity levels. 
     
     
       5. The apparatus according to  claim 1 , wherein the at least one processing core is configured to determine the activity type identifier based on sensor data obtained during the activity. 
     
     
       6. The apparatus according to  claim 5 , wherein the at least one processing core is configured to obtain the sensor data from the kinematic sensor. 
     
     
       7. The apparatus according to  claim 1 , wherein the at least one processing core is configured to determine the activity type identifier based on an identifier of an activity-type specific utensil the user uses during the activity. 
     
     
       8. The apparatus according to  claim 7 , wherein the activity-type specific utensil comprises at least one of a tennis racket, a squash racket and boxing gloves. 
     
     
       9. A method comprising:
 storing, in an apparatus, a user-specific calibration metric; 
 determining, in the apparatus, an activity type identifier of an activity a user is engaged in; 
 determining, in the apparatus, a user-specific intensity level of the activity, wherein determining the user-specific intensity level is based at least partly on the identifier of the activity type, the user-specific calibration metric and data obtained from a kinematic or speed sensor, and 
 obtaining, by the apparatus, the user-specific calibration metric by causing the apparatus to participate in a calibration procedure, the calibration procedure including communicating heart rate data of the user with a server 
 wherein the user-specific intensity level of the activity is determined while the user is not using a heart rate sensor. 
 
     
     
       10. The method according to  claim 9 , wherein the kinematic sensor comprises at least one of an acceleration sensor and an angular velocity sensor. 
     
     
       11. The method according to  claim 9 , wherein the communication with the server comprises providing to the server at least one of the following: a gender of the user and an age of the user. 
     
     
       12. The method according to  claim 9 , wherein the user-specific calibration metric comprises a mapping from a set of kinematic sensor data characteristics to a set of user-specific intensity levels. 
     
     
       13. The method according to  claim 9 , wherein the activity type identifier is determined based on sensor data obtained during the activity. 
     
     
       14. The method according to  claim 13 , further comprising obtaining the sensor data from the kinematic sensor. 
     
     
       15. The method according to  claim 9 , wherein the activity type identifier is determined based on an identifier of an activity-type specific utensil the user uses during the activity. 
     
     
       16. The method according to  claim 15 , wherein the activity-type specific utensil comprises at least one of: a tennis racket, a squash racket and boxing gloves. 
     
     
       17. A non-transitory computer readable medium having stored thereon a set of computer readable instructions that, when executed by at least one processor, cause an apparatus to at least:
 store, in an apparatus, a user-specific calibration metric; 
 determine an activity type identifier of an activity a user is engaged in; 
 determine a user-specific intensity level of the activity, wherein determining the user-specific intensity level is based at least partly on the identifier of the activity type, the user-specific calibration metric and data obtained from a kinematic or speed sensor, and 
 obtain the user-specific calibration metric by causing the apparatus to participate in a calibration procedure, the calibration procedure including communicating heart rate data of the user with a server 
 wherein the user-specific intensity level of the activity is determined while the user is not using a heart rate sensor.